Observed 10:30 AM EDT at KSEG

Herndon, PA weather

Sunny and 43°6°.

Mostly agree

Now 43°6°

Sunny

Wind: Calm; Light through 10 PM
Dew point: 37°3°; Comfortable
UV index: 1Low; Moderate 12–3 PM · peak 3
Pressure: 30.59 inHg1036 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

15°8° cooler than this time yesterday (54°12° then, 39°4° now)

Good hours for

Above 50°10° today by noon
Below 50°10° tonight after 8 PM
Below freezing tomorrow 7–9 AM (low 32°0°)
Fog tomorrow night midnight–1 AM
Fog tomorrow night 2–9 AM

This morningUp to 48°9° by 11 AM · Partly cloudy
This afternoonUp to 62°17° by 5 PM · Clear
TonightDown to 34°1° by 4 AM · Clear
Tomorrow morningUp to 50°10° by 11 AM · freezing, low 32°0° · Clear
Tomorrow afternoonUp to 64°18° by 5 PM · Clear
Tomorrow nightDown to 37°3° by 4 AM · Clear
Monday morningUp to 40°4° by 9 AM · Partly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 10a	Sunny	43°6° (likely 41°5° to 48°9°)	43°6°	0%	2 mph3 km/h from NW, gusts 3 mph6 km/h	77%	40%	1
Sat 11a	Sunny	48°9° (likely 44°7° to 53°12°)	48°9°	0%	1 mph2 km/h from N, gusts 3 mph5 km/h	65%	34%	2
Sat 12p	Sunny	53°12° (likely 49°9° to 57°14°)	53°12°	0%	1 mph2 km/h from NW, gusts 5 mph7 km/h	54%	14%	3
Sat 1p	Sunny	57°14° (likely 53°12° to 59°15°)	57°14°	0%	1 mph2 km/h from W, gusts 6 mph10 km/h	45%	0%	3
Sat 2p	Sunny	59°15° (likely 56°13° to 60°16°)	59°15°	0%	1 mph2 km/h from SW, gusts 6 mph10 km/h	41%	0%	3
Sat 3p	Sunny	61°16° (likely 57°14° to 61°16°)	61°16°	0%	1 mph2 km/h from SW, gusts 5 mph9 km/h	39%	1%	2
Sat 4p	Sunny	61°16° (likely 58°14° to 61°16°)	61°16°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	39%	0%	1
Sat 5p	Sunny	62°17° (likely 57°14° to 62°17°)	62°17°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	38%	0%	0
Sat 6p	Clear	58°14° (likely 52°11° to 58°14°)	58°14°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	45%	0%	0
Sat 7p	Clear	52°11° (likely 49°9° to 52°11°)	52°11°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	57%	0%	0
Sat 8p	Clear	49°9° (likely 47°8° to 49°9°)	49°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	66%	0%	0
Sat 9p	Clear	43°6° (likely 43°6° to 47°8°)	43°6°	0%	0 mph0 km/h, gusts 4 mph6 km/h	82%	0%	0
Sat 10p	Clear	41°5° (likely 41°5° to 46°8°)	41°5°	0%	0 mph0 km/h, gusts 3 mph5 km/h	89%	0%	0
Sat 11p	Clear	39°4° (likely 39°4° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 3 mph5 km/h	92%	0%	0
Sun 12a	Clear	38°3° (likely 38°3° to 44°7°)	38°3°	0%	0 mph0 km/h, gusts 3 mph4 km/h	92%	0%	0
Sun 1a	Clear	37°3° (likely 37°3° to 44°7°)	37°3°	0%	0 mph0 km/h, gusts 2 mph3 km/h	96%	6%	0
Sun 2a	Clear	36°2° (likely 36°2° to 43°6°)	36°2°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	12%	0
Sun 3a	Clear	35°2° (likely 35°2° to 42°6°)	35°2°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	13%	0
Sun 4a	Clear	34°1° (likely 34°1° to 41°5°)	34°1°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	12%	0
Sun 5a	Clear	34°1° (likely 34°1° to 41°5°)	34°1°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	12%	0
Sun 6a	Clear	33°1° (likely 33°1° to 40°4°)	33°1°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	14%	0
Sun 7a	Sunny	32°0° (likely 32°0° to 39°4°)	32°0°	0%	0 mph0 km/h, gusts 1 mph2 km/h	100%	15%	0
Sun 8a	Sunny	32°0° (likely 32°0° to 39°4°)	32°0°	0%	0 mph0 km/h, gusts 1 mph2 km/h	100%	14%	0
Sun 9a	Sunny	37°3° (likely 37°3° to 42°6°)	37°3°	0%	0 mph0 km/h, gusts 1 mph2 km/h	100%	14%	1
Sun 10a	Sunny	44°7° (likely 44°7° to 48°9°)	44°7°	0%	0 mph0 km/h, gusts 2 mph4 km/h	89%	1%	2
Sun 11a	Sunny	50°10° (likely 50°10° to 54°12°)	50°10°	0%	0 mph0 km/h, gusts 5 mph8 km/h	77%	2%	3
Sun 12p	Sunny	55°13° (likely 55°13° to 57°14°)	55°13°	0%	0 mph0 km/h, gusts 7 mph11 km/h	64%	2%	4
Sun 1p	Sunny	58°14° (likely 58°14° to 60°16°)	58°14°	0%	0 mph0 km/h, gusts 9 mph14 km/h	59%	2%	4
Sun 2p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	1 mph2 km/h from SW, gusts 8 mph13 km/h	51%	3%	4
Sun 3p	Sunny	63°17° (likely 60°16° to 63°17°)	63°17°	0%	1 mph2 km/h from S, gusts 8 mph14 km/h	48%	2%	3
Sun 4p	Sunny	63°17° (likely 60°16° to 63°17°)	63°17°	0%	1 mph2 km/h from S, gusts 9 mph14 km/h	46%	0%	2
Sun 5p	Sunny	64°18° (likely 59°15° to 64°18°)	64°18°	0%	0 mph0 km/h, gusts 8 mph14 km/h	46%	0%	1
Sun 6p	Clear	59°15° (likely 54°12° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 6 mph10 km/h	55%	0%	0
Sun 7p	Clear	54°12° (likely 51°11° to 54°12°)	54°12°	0%	0 mph0 km/h, gusts 5 mph8 km/h	66%	0%	0
Sun 8p	Clear	51°11° (likely 48°9° to 51°11°)	51°11°	0%	0 mph0 km/h, gusts 4 mph6 km/h	74%	0%	0
Sun 9p	Clear	45°7° (likely 45°7° to 49°9°)	45°7°	0%	0 mph0 km/h, gusts 3 mph4 km/h	93%	0%	0
Sun 10p	Clear	42°6° (likely 42°6° to 48°9°)	42°6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	12%	0
Sun 11p	Clear	42°6° (likely 42°6° to 46°8°)	42°6°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	39%	0
Mon 12a	Fog	41°5° (likely 41°5° to 45°7°)	41°5°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	44%	0
Mon 1a	Clear	40°4° (likely 39°4° to 44°7°)	40°4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	20%	0
Mon 2a	Fog	39°4° (likely 38°3° to 44°7°)	39°4°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	46%	0
Mon 3a	Fog	38°3° (likely 36°2° to 43°6°)	38°3°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	46%	0
Mon 4a	Fog	37°3° (likely 35°2° to 43°6°)	37°3°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	25%	0
Mon 5a	Fog	37°3° (likely 35°2° to 42°6°)	37°3°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	30%	0
Mon 6a	Fog	35°2° (likely 35°2° to 41°5°)	35°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	31%	0
Mon 7a	Fog	34°1° (likely 34°1° to 41°5°)	34°1°	0%	0 mph0 km/h, gusts 1 mph2 km/h	100%	32%	0
Mon 8a	Fog	35°2° (likely 33°1° to 42°6°)	35°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	36%	0
Mon 9a	Mostly sunny	40°4° (likely 33°1° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 1 mph2 km/h	96%	37%	1

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Sunny. High 62°17°, low 32°0°. Typical 61°16° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 34°1°
  Dry
Official NWS forecast
Today: Sunny, with a high near 62. West wind around 2 mph.
Tonight: Patchy fog after 4am. Clear, with a low around 32. West wind around 1 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
58°14°–62°17°
Low, likely
31°−1°–37°3°
Typical high / low
61°16° / 38°3°
Wind
5 mph8 km/h, gusts 11 mph17 km/h
UV peak
4
Tomorrow, Oct 25. Fog. High 64°18°, low 34°1°. Typical 60°16° / 38°3°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 32°0°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Fog, 37°3°
  Dry
Official NWS forecast
Day: Areas of fog before 10am. Sunny, with a high near 64. Southwest wind around 1 mph.
Night: Areas of fog after 9pm. Mostly clear, with a low around 34. Wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–64°18°
Low, likely
33°1°–39°4°
Typical high / low
60°16° / 38°3°
Wind
6 mph9 km/h, gusts 12 mph20 km/h
UV peak
4
Monday, Oct 26. Fog. High 69°21°, low 40°4°. Typical 60°16° / 37°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog before 9am. Sunny, with a high near 69. Northwest wind around 1 mph.
Night: Mostly clear, with a low around 40.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–69°21°
Low, likely
33°1°–41°5°
Typical high / low
60°16° / 37°3°
Wind
8 mph12 km/h, gusts 13 mph20 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 61°16°, low 35°2°. Typical 60°16° / 37°3°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 60°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 39°4°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 61.
Night: Mostly clear, with a low around 35.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–61°16°
Low, likely
35°2°–46°8°
Typical high / low
60°16° / 37°3°
Wind
10 mph16 km/h, gusts 19 mph31 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 61°16°, low 41°5°. Typical 59°15° / 37°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 38°4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 61.
Night: Mostly cloudy, with a low around 41.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
58°14°–61°16°
Low, likely
33°1°–42°6°
Typical high / low
59°15° / 37°3°
Wind
8 mph13 km/h, gusts 19 mph31 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 68°20°, low 44°7°. Typical 59°15° / 36°2°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Mostly sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 68.
Night: Mostly clear, with a low around 44.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
64°18°–68°20°
Low, likely
42°6°–47°8°
Typical high / low
59°15° / 36°2°
Wind
9 mph15 km/h, gusts 24 mph38 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 69°21°, low 42°6°. Typical 59°15° / 36°2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 44°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 69.
Night: Mostly clear, with a low around 42.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–70°21°
Low, likely
42°6°–49°9°
Typical high / low
59°15° / 36°2°
Wind
11 mph17 km/h, gusts 26 mph42 km/h
UV peak
3
Saturday, Oct 31. Cloudy. High 67°19°, low 45°7°. Typical 58°14° / 36°2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 42°6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 49°10°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
59°15°–73°23°
Low, likely
40°4°–50°10°
Typical high / low
58°14° / 36°2°
Wind
12 mph19 km/h, gusts 24 mph38 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 65°18°, low 49°9°. Typical 58°14° / 36°2°. Rain 0.02 in0.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  30% chance
3. Evening
  6 PM–midnight
  Cloudy, 56°13°
  40% chance
4. Overnight
  midnight–6 AM
  Cloudy, 52°11°
  30% chance · 0.04 in0.9 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
54°12°–69°21°
Low, likely
38°3°–53°12°
Typical high / low
58°14° / 36°2°
Wind
8 mph13 km/h, gusts 18 mph29 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 63°17°, low 51°11°. Typical 57°14° / 35°2°. Rain 0.19 in4.8 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 56°13°
  30% chance · 0.03 in0.8 mm
2. Afternoon
  noon–6 PM
  Drizzle, 64°18°
  30% chance · 0.02 in0.5 mm
3. Evening
  6 PM–midnight
  Cloudy, 54°12°
  30% chance · 0.02 in0.6 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
53°12°–70°21°
Low, likely
38°3°–58°14°
Typical high / low
57°14° / 35°2°
Wind
11 mph18 km/h, gusts 18 mph29 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 62°, low 32°.
Tomorrow
Dry, high 64°, low 34°.
Monday
Dry, high 69°, low 40°, warming up.
Rest of week
Mostly dry, highs 61–69°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (CTP) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Susquehanna River at Sunbury

8.5 mi

Below flood stage

Level: 7.2 ft
Flow: 8,340 cfs

Forecast peak 7.2 ft Sat 2 PM

Reading from Sat 9:45 AM · NWS gauge page

Penns Creek at Penns Creek

15 mi

Below flood stage

Level: 2.1 ft
Flow: 237 cfs

Forecast peak 2.1 ft Sat 2 PM

Reading from Sat 10 AM · NWS gauge page

West Branch Susquehanna River at Lewisburg

18 mi

Below flood stage

Level: 2.3 ft
Flow: 3,400 cfs

Forecast peak 2.3 ft Sat 2 PM

Reading from Sat 9:45 AM · NWS gauge page

Susquehanna River at Danville

21 mi

Below flood stage

Level: 3.2 ft
Flow: 4,450 cfs

Forecast peak 3.2 ft Sat 2 PM

Reading from Sat 9:30 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 68% less heating than a typical week.

This week 37Typical 117

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 27
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 24 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 37°F).

Open the windows?

Today, 3:00 PM–5:00 PM

Good stretch to open the windows (air quality forecast not available for part of this window).

Is this typical?

Selinsgrove Penn Valley Airport · official normals 1991–2020 · records 1947–2026

Oct 24, today vs a typical year

Today’s expected high is about typical for the date.

Last 7 days vs normal

On average 2°1° colder than normal (daily mean temperature).

−6°−4°SunOct 18
−1°MonOct 19
—TueOct 20
−1°WedOct 21
−2°−1°ThuOct 22
−1°FriOct 23
—SatOct 24

Herndon weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 45 min; Losing 2 min 30 s a day; shortest Dec 21, 1 h 30 min less
Golden hour: 5:35–6:31 PM; Morning 7:11–8:06 AM
Blue hour: 6:31–6:41 PM; Morning 7:00–7:11 AM; first light 7:00 AM

Stars tonight? Fair

Clear 6:41 PM–7:01 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:40 AM · rises 5:10 PM
Full moon: Oct 26
New moon: Nov 9

Looking west from Herndon.Skyline from USGS elevation data, heights drawn up to 5× taller. Sky, sun and moon as they are now.

Herndon, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Susquehanna River at Sunbury

Penns Creek at Penns Creek

West Branch Susquehanna River at Lewisburg

Susquehanna River at Danville

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon